Fire-door lock.



' A. ARENS & J. R. FLETGHBB.

' FIRE D0011 LOCK.

' APPLICATION IILED AUG.13, 1913.. 1,094,962. Patented Apr. 28, 1914.

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\ A EETC'HEI? (Mr KM smammw A. ARENS 51: J. R. FLETCHER FIRBDOOR LOOK.

- APPLICATION FILED AUG. 13, 1913.

Patented Apr. 28, 1914.

'3 SHEETS-SHEET 2.

IE4 '4 45a Q7? 1?. 7 212 761151? f1; wig/$00140, S

A. ARENS & J. R. FLETCHER.

FIRE DOOR LOOK.

APPLICATION FILED AUG. 13, 1913.

Patented Apr. 28, 1914.

a SHEETS-SHEET 3.

UNI ED strAtrEs PATENT OFFICE.

AUsUs'r ARENS ANnJAMEsR'. FLETCHER, 10a NEW BRITAIN, CONNECTICUT, ASSIGN- ORS TO THE AMERICAN HARDWARE CORPORATION, CUT, A CORPORATION OFCONNEGTICUT.

on NEW BRITAIN, CONNECTI- FIRE-DOOR LOCK.-

ioeao oa.

. Specification of Letters Patent; Patflted A r 28, 1914. Application filed August 13, 1313. Serial No. 784,470. 7

To all echo m it mag concern: I

Be it known that we, AU UsT AnENs and JAMES R. FLETCHER, citizensfof the United .States, residing at New Britaln, donnty of Hartford, State of Connecticut, haye 1nemployed-in connection with fire'doorsf.

and particularly fire doors of the hollow metal type. The device of the present '1nvention aims toprovide a device of'th s character, wherein the parts themselves "Com bine accuracy of operation with simplicity gree their installation; These and various other advantages will beseen from the 'deelevation of a hollow metal fire door showing locking mechanism of the present invention incorporated therein, the sides of the door being broken away to disclose the interior arrangement. Fig. 2 is a view in end elevation of the lock mechanism shown in Fig. 1. Fig. 3 is a fragmentary view in elevation of the edge of the door showing the application of the mortise lock thereto. Fig. 4 is a vertical section taken through the edge of the door on the line H of Fig. 3. Figs. 5, 6 and 7 are detail views of the lock mechanism, Figs. '6 and 7 being respectively horizontal sectionson the line 6-Q and 77 of Fig. 5. Figs. 8, 9 and 10 are detail views of the gravity locking mechanism. Fig. 11 shows a detail of one of thelatch bolts and its connection to the operating bar. Figs. 12, 1 3, 14 and 15 relate to details of, the lock mechanism.

Referring to the drawingsby numerals, 1 indicates a hollow metal bore" structure, within which the lock mechanism of the present invention, is inserted. This lock mechanism is arranged in two assembled units embodying a unit frame carrying a plurality of latching bolts and operating mechanism therefor, which frame is inserted within thehollovv door, and a' second unit comprising an assembled mortise lock mecln anism arranged to be. inserted within the hollow door from the edge thereof, and to cooperate with the latch bolt mechanism of the first unit, these 'two units being constructed and arranged for such cooperation.

The first unit of the lock mechanism is mounted upon a metalfraine 2, in'the form of an angle barextending vertically of and within the hollow metal door, one flange of this angle bar being designed to rest against the inner face of the jamb edge of the door structure. This flange of the angle frame is provided at a pluralityof points with enlargements or bosses 3 internally threaded J to receive machine screws 4, which are inof structure, and whereinthese parts are constructed to facilitate-t0 amaxlmum deserted from the outer jamb edge of the door,

-and by means of which the frame is drawn to bring its flange flat against the interior 'facesof the door, so that the bolt mechasecuring means is necessary to hold the lock firm to the interior of the door structure.

The jainb edge of the door structure may be counter-bored so that the heads of the machine screws 4 may seat therein and be flush with the edge of the door. Secured to the side flange of this anglebar frame at a plurality of points in vertical'alinement are journaled guides 5 of sheet metal, which guides are eachprovided with alined slots 6 in their sides to receive and guide an operating bar'7 designed'to cooperate'with the latch bolts, as hereinafter described. Seated within these journaled guide plates 5 and over the bar 7, are latch bolts 8 fornied preferably ofsheet metal and each having an end flange 9 to which is appropriately secured a cylindrical bolthead 10. The edge flange of the bolt frame and the edgeof the metal door are both recessed at points in alinement with these bolt heads to permit their projectionand retraction therethrough. Each of the bolts 8 is provided with a diagonal or cam slot 11 therein, and the operating. bar 7 at such points is provided with a headed stud 12 having an antifriction roller thereretracted. The sides ofthe journaled guides 5 are preferably punched in to provide guide lugs 1 loverlying the outer faces of the bolts S and serving to guide them in the proper plane of movement.

. The operating bar 7 adjacentthe upper and lower portions of the door structure is formed as a single bar. in order to permit the operat on of this bar through a mortise lock mechanism such as hereinafter de-.

scribed, it will be evident that means must be provided whereby the lock case of this mechanism may be inserted in proper rela tion to the operating bar without interfering with the operation ofsaid bar. Therefore, at the point where the lock case of the 1norti'se look is to be inserted, we give the 013-."

crating bar a bifurcated formation to provide a pocket within which the lock case may be inserted. This is efi'ected by providing spaced plates 15 having a portion of their sides turned inwardly, as'at 15, to form a central or hearing flange for the lock case, and havingtheir upper and lower ends, as at 18, turned inwardly, and thence bent to embrace therebetween the upper and lower ends of the operating-bar 7. This bar 7 does not extend. the entire vertical height of the frame 2, but is cut off at points above and below the point of the mortise lock for connection to the spacedplates 15, which plates form in effect-part of the operating bar.

The plate 15 located at the exterior side of the bar, is provided with an elongated clearance slot 16 for the cylinder lock, and also with alined elongated clearance slots 17 toward the knob spindles of the mortise lock. The space between the plates is greater than the width of the lock case, and is pro vided to give space for plates 19 secured to the inner faces of the spaced plates 15 at alined points and each provided with abutment flanges 20. These abutment flanges are designed to cooperate with the mortise lock mechanism and form a means whereby the operating bar 7 is moved to retract the latch bolts.

The mortise lock forming the second unit of this lock mechanism is inserted from the jarnb edge of the door, the a-mb edge of the door structure being cut away at this point and'the face plate 22 of this lock being secured to bosses or enlargements 23 formed -means of suitable screws.

on the edge-flange of the lock frame 2 by The lock case 21 of the mortise lock' extends inwardly from the edge of the door and in between the spaced plates 15 and into the pocket formed thereby. This mortise lock mechanism is of a standard type and is inserted within the 1 door as above described, the knobs and their 60 spindles being subsequently inserted through suitableopenings formed in the front and .rear sides of the door structure, these spindles extending through the clearance slots 17 in plates 15 and connectin with the latch. bolt mechanism of the mortise lock in moeeeea v the :usual manner. plates 2st are provided on the outer face of the/door and the usual cylinder loch mecha- .nism 25 is inserted through a suitable opening formed in one of the cscutcheon plates and in the door structure, this cylinder extending through the clearance slot 19 and .sccuring into the lock case 21 in the usual manner; We should add that the clearance slotsltlian'd 17 are provided to permit. the movement ofthe plates 15 of the operating bar relative to the parts of the mortise lock mechanism inserted therethrough.

Means are provided for moving the operating bar 7 through the turning of the knobs to retract the latch bolt of the mortise lock. These means preferably take the form of roll-backs 30, whose hubs 29 are suitably secured to the hubs 28 of the knob spindles, as by screws, so that these roll-back members will be positioned a t the outer side of the lock case between said case and the inner faces of the plates 15 and in a plane with the abutment flanges 20. By the operation of the knob spindle to retract the latch bolt of the mortise lock, it will be evident that the rollback'members 30 will be turned to engage the abutment flanges, raise the spaced plates 15 and operating bar 7, so that their studs 12 and antifriction rollers 13 will act against the cam slots 11 of the spaced bolts and re tract said bolts in this direction of movement of the operating bar. This operating bar with its plates 15 is normally moved downwardly by gravity, so that the bolts cont-rolled thereby are projected. The operation of the knob of the mortise lock to retract its own latch bolt therefore serves to move the operating bar to retract the spaced latch bolts also.

In a device of this character it is preferable to provide means whereby the operating bar and its latch bolts are retained in retracted position when the bar has been moved to retract these bolts and when the door has been opened. To this end, we provide a gravity-controlled latching device carried by the lock frame 2 and 006 aerating with the upper end of the bar 7 to et'ect this result. This latching device is preferably constructed as follows: Secured to the angle frame 2 is a housing 31, within which is pivotally mounted an auxiliary latch 32 connected at a point adjacent its pivoted end, as at 33, with one end of a locking slide 3; Mounted on a stud 35 above this latching 36 is weightcdnindwhose lower end 36" is provided with an elongated slot therein guiding upon a stud 38 projecting from the side of the locking slide 34. This locking slide is guided and limited in its movement by means of a pin 39 projecting from the i said bar. The edge of the operating bar 7 The usual escutclieon' slide is a bell crank lever whose upper end lock frameQ and guiding in a slot l0 in thelatter extending a cesses forming holding shoulders 41 and 42,

the edgethan the t'oirnier. 'A holding stud t3ext'ends from the rear face'of the locking -bar 3.4, and, when the:oper at1ng bar-7 1s I able embod ment ot our-invention, we desireraised to retract the latch bolts, as herein beforedescribed, thisstud =43 will engage with one of the shoulders' ll c1 42 pf the bar to hold the bar in raised position, Thisis etl'ected as follows: Theweight of the bell crank lever acting against thestud 38 of the locking bar normally presses the bar out wardly toward the edge of the door and in movement of the bar. 3'5

afdirection. to bring its stud 43 against the edge of the operating bar 7., In so doing, it projects thelatcli bolt 32 beyond the jam'b edge of the door. When the door is closed,

this-latch bolt 32-will-engage the flush face of the door casing and be forced inwardly, thereby moving the lug 43 of the locking.

bar away-fro-i i the edge of theoperating bar 7, when the knob of the mortise lock is operated to raise theoperating bar 7 and retractthe :latch bolts controlled thereby. {This will bring one of theshoulders 41 or 42 opposite and in line with the upper edge;

'oftlie lug L3, so'tliat when the door is opened the weighted bell crank lever will .projct'fhe latch 32' and will. bring the lug under one of the two locking shoulders 41- -42. which havefibe'en raised to a position in line with thislng by the latch retracting As long as the door remains open, the weight of the bell crank leveinwill hold the lug A13 in engagen'ient -with one ofgthese shoulders and thereby re lta'in the operating bar in bolt-retracting position, but soon as the door 'is closed, the

latch 32 is forced inwardly by the flush face of the door jamb and will move the lug 43 from engagement with the shonlder,' whereuponthe operating bar 7; will move down wardly by gravity, projecting. thelatch bolts. We provide two shoulders' ll and42 so that in the event the knob is not given a 4 full turn to fully retract the latch bolts, the.

rating bar will nevertl'ieless be locked.

:In practice, aclearance of a fraction of an .inch is allowed between the edge of the door' and the door 1amb. In casea timid person,

i only partially turns the knob butsufiiciently to. withdraw 'tlielatch bolts far enough for door-opening, the operating barl will have 55,i-ts shoulder 41 engagedby the locking-lug 43. 'If a complete turn is given the knob,

ithe second shoulder 42 will be positioned op- GS'tliese roll backs need not be carriedbythe posite the lug 43 and the operating bar held under these conditions also.

NVe havetdescriliied the roll-back members 30"as carried by the lock case 21 andsecured tothe hubs of the knob spindles, so that they areoperated by the turning of theknob spindle. .It will be evident, however, that eater distancefroni'.

lock, case, but may be joiirnaled for instancein the lock frame 2, and'op'erated by the knob spindles in thesanie manneit The construction first described is, however, the preferable one. J, I

While'we have herein describeda preferit understood that. various changes in structureand relative arrangement of parts is possible within the spirit of the intention I 'lVhat we claim-is; v 1. A look mechanism forhollow door structures comprising in comb nation a. frame niounted'within said door, aplurality of spaced latch bolts carried by'said frame,

and tllSCOPQOf the appended claims.

a common operating connection for said bolts an assembled lock mechanism independent of said frame and including a bolt nd means for pro ectmg'and retracting the same, ,saidlock mechanism extei'iding 1nwardlyof said door edge andcooperating with; said operating connect-ion to control said'latch bolts. l'

2. locli mechanism, for hollow door structures, comprising in combination a frame mounted within and extending vertically of said door a plurality of spaced latch [bolts carried by said frai'n'e, a common o per-.

ating. connection for said bolts, meansjnorma'lly tending to project said bolts, an asse'mbled lock mechanism independentof said frame and including a bolt and means for projecting and retracting the same, said mechanism extending inwardly of said door edge'and being arranged and ppsitioned to cooperate with said operatingconnect on to retract said latch bolts upon the retractio 'i of its own bolt.

3. A lock mechanism for hollow "door structures, comprising in C(JillbillfltlOll' a frame'mounted within and extending vertically of said door, a plurality of spaced latch;

bolts carried by said frame, a common open ating connectlo'n for said bolts, means nor-' mally tending to pro. ect sald bolts, an assembled lockmechanisin independent of said frameandincludin a bolt and means for progectmg and retracting the same. said mechanism extending inwardly of said door edgeand being arranged and positioned to cooperate with said operating connection to, retract said latch bolts upon the retraction of its own bolt, and means-operable upon the ,retraction'o'f said latch bolts and .the

opening of, the door to automatically hold. sa d operating connection in .boltretracted position and operable upon, the closing of v the doonto release said connection whereby said. latch; bolts lnay be projected.

4. 'A -lock incchanisn'i for hollow A door structures, comprising 1n= combination a frame mounted withinand extending verlically of said door, a plurality of. spaced" latch bolts-carried "by said frame, a coinmou operating connection for said bolts, an assembled knob-controlled lockmechanism independent of-said frame and latch bolts and extending inwardly of the edge of said door, said lock mechanism being detachably secured to said frame and being arranged and positioned relative thereto to cooperate with the'operating connection of said latch bolts to operate said bolts upon its operation through said knob control.

5. A lock mechanism for hollow door structures, coinprisingfln. combination a frame mounted within and eytendin verti cally of said door, a plurality of vertically spaced latch bolts carried by said frame,'a common operating connection for said bolts, said connection being shaped to provide a pocket, means normally tending to project said bolts, anass'embled mortise lock mechanism, including a knob-controlled latch bolt, independent of said frame andextending .imvardly fro-inthe edge of said door and within said pocket, said mortise lock mecha' nism being detachably secured to said frame and being arranged to cooperate with said operating connection to 'ope ate its bolts upon the retraction of the latch bolt of said mortise look. I

(3. A look mechanism for hollow door structures, comprising in combination, a frame mounted within and extending vertically'of said door, a plurality of vertically spaced latch bolts carried by said frame, a reciprocating operating member carried by said frame and common to and in operative connection Witlreach of said bolts, said member being normally positioned by gravity to project said bolts and being formed \vitlr'a pocket and an abutment), an assembled mort-lse lock mechamsm mcludmg a' knob-controlled latch bolt independent of said frameand extending'inwardly from the edge of said door and Within said pocket, a roll-back member cooperating With said abutment and operated by latch bolt retracting movement of a knob of said mortise look to actuate said operating member ini a direction toretract said plurality of latch bolts. 7. A look mechanism fordiollow doo structures, comprising in combination, a frame mounted within and extending vertically of said door, a pluralityvof vertically spaced latchbolts carried by said frame, a reciprocating operating member carried by said frame and common to and in operative connection with each of said bolts, saidv member-being normally positioned by gravity to project said bolts and'bemg formed with a pocket and an abutment, an assembled mortise lock mechanism including a knob-controlled latch ,bolt independent of said frame and extending inwardly from the edge of said door and-within said pocket, a roll-back member cooperating with said abutment and operated by latch bolt retl'mting moi ement of a knob of said mortise lock to actuate said operating member in a direction to retract said plurality of latch against the edge of said door and extending vertically thereof, a plurality of vertically spaced latch bolts carried by said frame, a reciprocating operating bar carried by said frame and including a bifurcated portionforming a. pocket and complement abutments, means of operative connection between said bar and each of said latch bolts including cam slots and cooperating studs whereby movement of said bar projects and retracts said latch bolts, said bar being normally positioned by gravity to project said bolts, an assembledmortise lock mechanism including a latch bolt and'oppositely disposed knobs and spindles, said l'ock mechanism having its face plate detachably se- -cured to said frame and its lock case extending within said operating bar pocket, an

operating roll-back member cooperating with each of said abutments, and means of connection between said knobs and said rollback memberswhereby latch-retracting movement of a knob operates a roll-back member to engage its abutment and move said operatin said latch bolts. v

9. A look mechanism for hollow door structures, comprising in combination a flanged metal frame mounted within and against the edge of said door and extending vertically thereof; a plurality of vertically spaced latch. bolts carried by said frame, a reciprocating operating bar carried by said frame and including a bifurcated portion forming a pocket and complement abutments, means of operative;connection between said bar :and each of said latch bolts including can'islots and cooperating studs whereby movement .of said bar projects and retracts said latch bolts, said bar being nor mally positioned by gravity to project said bolts, an assembled mortise lock mechanism including a' latch bolt and oppositely (118- posed knobs and spindles, said lock mecha nismhaving its face plate detachably secured to said frame and its lock case extending within said operating bar pocket, an operating roll-back-member cooperating with each of said abutmonts, means of conbar in a direction to retract nection between said knobs and said roll-back members whereby latch-retractingmovement of a knob operates a roll-back member to... engage its abutment and move said operating bar in a direction, to retract said latch bolts, and 'a-nautomatic gravity-controlled latching device cooperating Withsaid bar and door casing'to'engageand hold said ba-r in bolt-retracted position upon the retraction ofsaid bolts thereby and the openingv of the door, and operable upon the closing of the door to release said bar whereby said bolts are projected thereby.

10. A lock mechanism; of *the a hollow door structure and carrying a plurality of bolts and a common operating connection" therefor, a nd'the other or said. units embodying. a lock mechanism includ-..

eration of its own'bolt.

11. A look mechanism of th e ,charactei' described, embodying two separate and assembled units, one of Silld units comprising a metal frame arranged for nsertion within and connection .to a. hollow door to extend vertically thereof, said frame carrying a pin. rality of spaced latch bolts'and'a common-f operating connection therefor, and the other of said units embodying a mortise lock meclianism including a knob-controlled latchbolt arranged to be inserted within said door structure and to be operatively connected to said boltoperating connection of the "first unit by the insertion of a knob spindle. I 12. A lock mechanism of the character described, embodying two separate and assembled units, one of said units embodying a metal frame arranged for insertion within and connection to a hollow door to extend vertically thereof, said frame carrying a plurality of vertically spaced bolts and a common operating connection therefor provided'with. a pocket therein and with an abutment, and the other of said units embodying a mortise lock mechanism including a latch bolt and a knob and spindle arranged to retract the same arranged'to be inserted within said door structure from the edge thereofand to extend within said pocket, said knob spindle being arranged to cooperate with said operating connection and said abutment upon latch-retracting move ment thereof, to operate said connection to retract said latch bolts;

13. As. an article of manufacture, a" flanged metal lock-s frame arranged form-- sertion within a hollow door structure to ex-- tend vertically thereof and having one of its to ses ceive attaching. machine screws. 14., In. a lock of the character character described, embodying 'two separate and assembled units, one of said units comprising alock frame arranged for insertion within v {is flanges arranged for connection to the jainb edge "of a door structure, said flange being provided -witha plurality -of vertically f spaced bosses and with threaded bores extending through said bosses arranged to redescribed, a plurality of spaced bolts, an operating memher operatively connected'with each of said bolts and normally tendingto project the same by gravity, manually-controlled means for actuating said operating member to retract said bolts, and a gravity-actor!tedlatch ing device cooperating with said operating member to engage and hold the same against. move-mental; a plurality of predeterminedv bolt-retracting positions. I f 15; In alock of the character described, a

plurality of spaced bolts, an operating bar.

operativelyconnected with each of saidbolts andnormally tending to project the same by gravity, said operating bar having one edge recessed to provide a plurality of locking shoulders at progressively greater distancesv from its edge, manually-controlled means for moving said operating bar to retract mg to engage with said locking shoulders, atdifferent points ofbolt-retracting move ment cit-said bar, said slide having connections cooperating with the door casing to umove saidslide from holding engagement said bolts, anda. gravity-controlled slide .haying a lockinglabutment normally tend with said bar'upon the closing of the door whereby said bolts may be projected by gravity through said operating bar.

16. A lock mechanism for door structures comprising, in COIIlbIIliLtlOII, a ,la'tch bolt gmechanis' m seated within the door structure and including a latch b'olt and an operating connection therefor, an assembled lock mechanism independent of said latch mechanism and including a'bolt, and means for projecting and retracting the same, said lock mechanism including means arranged for operative connection withtlie operating connection of said latch mechanism to operate its bolt.

17. A lock mechanismfor door structures comprising, in combination, a latch mechanism seated within said door structure and including a plurality of latch bolts and operating connections therefor, an assembled lock mechanism independent of said latoh mechanism'and including a bolt, and means for projecting and retracting the same, said lock mechanism including means arranged.

for operative connection with the operating connections of said l'atch'mechani sm to 0p -erate the latch bolts thereof.

'18. A look mechanism for hollow door' structures comprising, n comb1nat1on,- a

structure and "having an operating connection therefor, ,an'assembled' lock mechanism,

latch bolt mounted within said hollow door including a bo-lt' and means for projecting and retracting the same, said lock mechanism being independent of said latch bolt and including means arranged to be operatirely positioned within said hollow door to cooperate with the operating connection of said-latch bolt to operate said bolt.-

19. A look mechanism of the character described, embodying two separate and indiependent-assembled units, one of said units comprising a plate arranged for insertion within a hollow door structure and carrying a latch bolt and an operating connection therefor, and the other of said units embodyrea ises AUGUST ARENS. JAMES R. FLETCHER. \Vitnesses: I H. E, SGHENY,

C. A. PARKER. 

